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NTIS

01/01/1988

Collation

ix, 88 p. : ill., graphs, charts ; 28 cm.

Abstract

Sewer line scouring, urban runoff, and combined sewage associated with storm events represent a substantial organic pollution load. Since storms usually exhibit high flow rates over a short period of time, the treatment facilities become overloaded and deliver an organic pollution load to receiving water bodies. Many times a significant amount of the combined sewage bypasses the treatment plant and is discharged untreated. A method for assessing the organic content of storm related wastewaters would permit programming discharges, and monitoring and controlling treatment processes. A variety of laboratory techniques have been employed to measure this organic loading, but only an on-line technique such as continuous TOC will provide the necessary information on a real or quick-time basis. An evaluation of the instrumentation necessary for a reliable TOC in the stormwater environment leads to the selection of a measurement system based on total combustion of sewage and detection of CO2 by infrared methods. Tests are presently under way to establish sample processing, modifications of the engineering model, and accumulation of the continuous monitoring data on total organic carbon content of storm and combined sewage.